Effect of beryllium on burning of magnesium in Al-10%Mg alloy

Effect of beryllium on burning of magnesium in Al-10%Mg alloys is studied by thermobalance technique. The results are as follows: (1) Beryllium is useful element to prevent oxidation of magnesium in Al-10%Mg allols. Even a very small amount of beryllium, e. g. 0.001%, plays a good role, if the molten alloy is held for a short time. (2) Burning of magnesium proceeds by making lots of pits in molten alloy and when the “pit-burning” starts, beryllium element is no longer effective. (3) Beryllium inhibits the burning of magnesium also in the solid state alloy, hence the formation of feathered semitransparent films during solidification of the alloy would be prevented by adding beryllium.